Just a bit more on Jon's point about drooping and sectioning the front of these cars.

With a Camaro, they sectioned or reduced the height of the radiator support and then had to deal with a few other issues that result (back of front fender to door gap, cowl interference to underside of back edge of hood, etc.). But with a Camaro, the radiator support and inner fenders are removable for the modification effort.

With a '69 or '70 Boss Mustang, the inner front fender and radiator support are an integral piece of the whole front chunk of the unibody. Therefore, the effort to section and droop the nose on the team Boss 302s was even more involved than a Camaro. Many of the factory Boss 302s (Bud Moore and Shelby teams) had differing levels of droop with each car. If any of the readers have a chance to attend a vintage race with the Historic Trans-Am cars, check out the droop on Brian Ferrin's Bud Moore Boss. The droop is most noticeable if you happen to stand at the back of the hood to cowl union, and get down to back of hood height. The drop off from that point to the front of the hood is quite severe, especially if you have a "standard" height front sheetmetal Boss nearby to compare it to. A reasonable view of what I'm talking about on Brian's car can be seen here: http://historictransam.com/images/wc048967.jpg

Though I'd read that Roy Woods liked to use Bartz engines, that oil fill cap on the 2-4-6-8 cylinder side valve cover is a Bartz signature piece as well. The caps Bartz liked to use are a two piece, spot welded affair. The "ears" portion of sheetmetal is spot welded to the cap, that then goes into the cammed bung/neck. Though similar in appearance and function, this unit is a little different than the one-piece cap and ear items you see being sold today by ATL, Fuel Safe, etc.

Roy Woods also used Bob Joehnck engines. I'm not sure if this is a Joehnck or Bartz engine. If someone was wanting to recreate covers like these, would either of you know where they could come up with the pieces to make a cap like that? It seems like it would have been something that was sourced from something else, not made from scratch.

This photo is of the Bud Turner '67 Camaro engine as seen in the "How to Hot Rod Small Block Chevys" book.Notice the homemade cowl plenum air cleaner going the opposite direction of "normal". That's because thiscar had a transmission cooler up in the top of the cowl on the passenger side so it was improvisation time.Other items of interest are the Corvette radiator, the cut-down flex fan and the Z28 1x4 intake and valve covers.

This picture from "The Complete Chevrolet Book, No. 2" shows Bud Turner's '67 Camaro at the 1971 RiversideTrans-Am, car #12. It changed from the white with black hood paint job of 1970 to a medium blue with yellownose stripe and yellow accents on the side of the roof and rear (but kept the black hood).

This is from a MT/PP 1968 Yearbook (trying to avoid the copyright Thought Police then), featuring as it does season reviews of select racing series run across 1967. No specific notice as to just what car is being inspected, but the cowl induction air pickup seems to match the '67 Marlboro photograph seen elsewhere in this thread. Appalled to notice I've lost the same yearbook over the course of a mere 24 hours, hence desire to scan same and afford the reader a higher resolution image has for the moment been thwarted. Thanks...

Thanks very much for posting that photo. I don't own that particular publication so it's a new one to me. Based on some things such as the chrome valve covers, the stock fuel line, the fan and fan shroud, and a lift off hood, I am confident that it is not the Penske/Donohue car. Just whose car it is though, I'm not sure. The air cleaner to the firewall was a General Motors part available to anybody and not something custom-made by the Penske team. If you are able to find the yearbook again, a higher resolution image posted here would be very appreciated.

That is the engine compartment of the first '67 Penske Camaro (the car that Mark drove through the first 8 races of the '67 season) but it is after the car went to Europe. I believe the photo may be from 1969. I received that photo from Jeff Barley in England. I'm not sure if you received it from the same source or if I may have forwarded it to you.